processing column: per-card stop button alongside the column-header one

src/features/pipeline/ProcessingColumn.tsx

@@ -40,7 +40,16 @@ export function ProcessingColumn({ items, progress, queueStatus, onMutate }: Pro
 
 			{job ? (
 				<div className="rounded border bg-white p-3">
-					<p className="text-sm font-medium truncate">{job.name}</p>
+					<div className="flex items-start justify-between gap-2">
+						<p className="text-sm font-medium truncate flex-1">{job.name}</p>
+						<button
+							type="button"
+							onClick={stop}
+							className="text-xs px-2 py-0.5 rounded border border-red-200 text-red-700 hover:bg-red-50 shrink-0"
+						>
+							Stop
+						</button>
+					</div>
 					<div className="flex items-center gap-2 mt-1">
 						<Badge variant="running">running</Badge>
 						<Badge variant={job.job_type === "transcode" ? "manual" : "noop"}>{job.job_type}</Badge>